Report of small glass bottle in papers (4)
I believe the answer is:
file
'papers' is the definition.
(thesaurus)
'report of small glass bottle' is the wordplay.
'report of' indicates a 'sounds like' (homophone) clue.
'small glass bottle' becomes 'phial' (I've seen this before).
'phial' is a homophone of 'FILE'.
'in' acts as a link.
(Other definitions for file that I've seen before include "Cutting tool or line of people" , "Smoothing tool; organised data" , "(Set of) documents- line" , "Line on board" , "Three Dn and this can indicate ordinary people" .)